Also unlike Mana Confluence, though, you have to have an artifact on the battlefield to use the second ability of adding a mana of any color to your mana pool, which also restricts the decks it can be maximized in to ones with artifacts
Obelisk of Urd does ask for you to go significantly wide at a low rate
I can recover from a boardwipe pretty well if all my vampires turn into bats and can turn back into vampires by doing combat damage to an opponent
With grass's fire weakness, and the new energy amplification on Charizard, I expect fire to make a huge leap in the meta and see top usage in the near future
If Bandai offers a Pre-Release for this set, by Pre-Ordering Newtype Rising [GD-01] Booster Boxes you MAY be able to pick-up some, if not all, of your Pre-Order during the Pre-Release weekend which is typically 1 week before the actual Release Date (while Pre-Release supplies last)